Smiling is a sign of openness and good humor. It says, "Hey! Life is generally good! I let the little things roll off me! I'm definitely not thinking about the tone of voice you used with me earlier."
2. Understand That You Won't Love Everyone
3. Be Willing To Confront Problems
Conflict obviously isn't great but when there is an incident or issue, feel confident enough to talk about it respectfully with that person.
For instance, remember that time John raised his voice at you in front of your client and tossed your clipboard on the ground? You could have said something to him in private like, "Hey, John, it's not a huge deal and I know that sometimes we miscommunicate or disagree but it's not okay with me when you treat me the way you did earlier. I want to have a good working relationship with you. I think you're great at your job. I'm so sorry if you have felt a lack of cooperation or civility from me, I'm going to try to be better." It takes a bit of humility and a bit of courage but IT WORKS.
4. Be Unfailingly Communicative
To avoid potential ugliness as a result of miscommunication, make sure that you are actively listening and saying what you really mean as clearly as you can. You're a valuable member of your team, so don't hold back the things you feel are important but always offer others the courtesy of a purposeful listening ear.